I was eager to try Pinkberry because everyone was making it seem as if it was the end all of all frozen desserts. It's not.
Basically, it tastes like plain yogurt that's been run through a soft serve machine. Combine that with ghetto toppings like Capn Crunch and the hefty price tag, and basically you're overpaying for something you could whip up at home. There are only two flavors, plain and green tea, which you can top with a dozen or so toppings (mainly cereal or fruit). The plain flavor is quite tart. The green tea flavor is extremely strong and overwhelming, so I'd steer clear of that. Their claim to fame is that it's low cal and low fat, so if you're watching your diet, then maybe I'd have a more favorable view of the stuff.
Lines are out the door, but it's beyond me as to why this is considered special. Maybe I'm more of a gelato person, but I wasn't impressed in the least by Pinkberry.